SD cards have started getting cheaper, and you can find some pretty huge cards at prices that seem worth the joy of never swapping out cards again. Here's why that could be a bad idea.

Weblog Techerator notes that, while we never expect SD cards to fail, they can do so at inopportune times, just like the hard drives in our computer. This is why we regularly back our computers up, even if we have a brand new drive—sometimes things just happen. However, we don't always have this opportunity with SD cards:

Since you can't really back up a memory card when you're out in the field shooting photos and video, how do you protect yourself against bad luck? Well, there's obviously no way to fully protect your memory card data if you can't back it up, but there's still a way to lessen the disaster level when a memory card takes the plunge.

Instead of getting just one high-capacity memory card and risk losing all of your photos, have multiple low-capacity cards. That way, if one craps out, you'll still have a majority of your photos that are safe, instead of having all of them go down the drain at once.

Instead of worrying about capacity, see if you can't get some higher speed cards instead, or ones designed to survive the worst of conditions. That way, if one fails, you haven't lost everything—you've only lost a batch or two of photos. Of course, this only really matters for you serious photographers that are taking hundreds of pictures at once, but it's something to think about if you regularly run out of space on your current card. Hit the link to read more.